How to Build an At-Grade Sewage Disposal System


There are 2 types of at-grade systems:


          Type A (stone on contour)      

Type B  (stone to level)


You will note in the above end-view diagrams that the top of the Type-A at-grade mound parallels the slope of the land surface while the type-B system's top is level. The two types are not interchangeable and each must be installed as required by the permit.

This program will only address the construction of Type-A at-grade systems.


Back       Next


Back to Program Index

Back to Home Page